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See the following
example.
Example.5. RDFS defines primitive ???Class???, and OWL also defines primitive ???Class???.
Though the two ???Classes??? have the same name, they have different semantics; the
???Class??? in OWL permits greater expressiveness than the ???Class??? in RDFS. Thus the
primitive ???Class??? in OWL mutates the ???Class??? in RDFS (see Figure 6).
Easy.Use.of.Ontology.Languages
In the ???Operations to Organize Ontologies??? section, we discuss how to describe
the relationships among the primitives in different ontology languages based on
different operations. Based on the relationship description in ???Operations to Organize
Ontologies,??? we can process the following two problems efficiently: (1)
automatically use the existing ontologies defined with ontology languages DAML,
OIL, and DAML+OIL; and (2) automatically translate single namespace to proper
namespaces.
1. Using ontologies defined with ontology languages DAML, OIL, and
DAML+OIL
Before OWL appeared many ontologies have been defined based on the ontology
languages DAML, OIL, and DAML+OIL.


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